Sash Balance Identification

A home owner from Lakewood, CA says:
This balance is 31.75 " overall length, 1/2" wide and 9/16" deep with a spring length of 19" eye to eye. It is stamped rA3045 on the back side.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
We should be able to help, but it looks like your bottom shoe (third picture) has broken off. Does the other balance in the window have this bottom shoe still intact? If so, I'd like to see it. Please also give me its size.
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